① 对输入文法，由程序自动构造FIRST FOLLOW集

② 对输入文法，由程序自动生成它的LL(1)分析表；

③ 对于给定的输入串，应能判断识别该串是否为给定文法的句型。-① the input grammar, automatically constructed by the procedures set FIRST FOLLOW ② the input grammar, it is automatically generated by the process of LL (1) analysis table　③ For a given input strings, should be able to identify the string to determine whether a given grammar sentence.